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-rw-r--r--security/sandbox/chromium/sandbox/win/src/registry_interception.cc261
1 files changed, 261 insertions, 0 deletions
diff --git a/security/sandbox/chromium/sandbox/win/src/registry_interception.cc b/security/sandbox/chromium/sandbox/win/src/registry_interception.cc
new file mode 100644
index 0000000000..d8bb82949b
--- /dev/null
+++ b/security/sandbox/chromium/sandbox/win/src/registry_interception.cc
@@ -0,0 +1,261 @@
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "sandbox/win/src/registry_interception.h"
+
+#include <stdint.h>
+
+#include "sandbox/win/src/crosscall_client.h"
+#include "sandbox/win/src/ipc_tags.h"
+#include "sandbox/win/src/policy_params.h"
+#include "sandbox/win/src/policy_target.h"
+#include "sandbox/win/src/sandbox_factory.h"
+#include "sandbox/win/src/sandbox_nt_util.h"
+#include "sandbox/win/src/sharedmem_ipc_client.h"
+#include "sandbox/win/src/target_services.h"
+#include "mozilla/sandboxing/sandboxLogging.h"
+
+namespace sandbox {
+
+NTSTATUS WINAPI TargetNtCreateKey(NtCreateKeyFunction orig_CreateKey,
+ PHANDLE key,
+ ACCESS_MASK desired_access,
+ POBJECT_ATTRIBUTES object_attributes,
+ ULONG title_index,
+ PUNICODE_STRING class_name,
+ ULONG create_options,
+ PULONG disposition) {
+ // Check if the process can create it first.
+ NTSTATUS status =
+ orig_CreateKey(key, desired_access, object_attributes, title_index,
+ class_name, create_options, disposition);
+ if (NT_SUCCESS(status))
+ return status;
+
+ if (STATUS_OBJECT_NAME_NOT_FOUND != status) {
+ mozilla::sandboxing::LogBlocked("NtCreateKey",
+ object_attributes->ObjectName->Buffer,
+ object_attributes->ObjectName->Length);
+ }
+
+ // We don't trust that the IPC can work this early.
+ if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
+ return status;
+
+ do {
+ if (!ValidParameter(key, sizeof(HANDLE), WRITE))
+ break;
+
+ if (disposition && !ValidParameter(disposition, sizeof(ULONG), WRITE))
+ break;
+
+ // At this point we don't support class_name.
+ if (class_name && class_name->Buffer && class_name->Length)
+ break;
+
+ // We don't support creating link keys, volatile keys and backup/restore.
+ if (create_options)
+ break;
+
+ void* memory = GetGlobalIPCMemory();
+ if (!memory)
+ break;
+
+ std::unique_ptr<wchar_t, NtAllocDeleter> name;
+ uint32_t attributes = 0;
+ HANDLE root_directory = 0;
+ NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes,
+ &root_directory);
+ if (!NT_SUCCESS(ret) || !name)
+ break;
+
+ uint32_t desired_access_uint32 = desired_access;
+ CountedParameterSet<OpenKey> params;
+ params[OpenKey::ACCESS] = ParamPickerMake(desired_access_uint32);
+
+ bool query_broker = false;
+ {
+ std::unique_ptr<wchar_t, NtAllocDeleter> full_name;
+ const wchar_t* name_ptr = name.get();
+ const wchar_t* full_name_ptr = nullptr;
+
+ if (root_directory) {
+ ret = sandbox::AllocAndGetFullPath(root_directory, name.get(),
+ &full_name);
+ if (!NT_SUCCESS(ret) || !full_name)
+ break;
+ full_name_ptr = full_name.get();
+ params[OpenKey::NAME] = ParamPickerMake(full_name_ptr);
+ } else {
+ params[OpenKey::NAME] = ParamPickerMake(name_ptr);
+ }
+
+ query_broker = QueryBroker(IpcTag::NTCREATEKEY, params.GetBase());
+ }
+
+ if (!query_broker)
+ break;
+
+ SharedMemIPCClient ipc(memory);
+ CrossCallReturn answer = {0};
+
+ ResultCode code = CrossCall(ipc, IpcTag::NTCREATEKEY, name.get(),
+ attributes, root_directory, desired_access,
+ title_index, create_options, &answer);
+
+ if (SBOX_ALL_OK != code)
+ break;
+
+ if (!NT_SUCCESS(answer.nt_status))
+ // TODO(nsylvain): We should return answer.nt_status here instead
+ // of status. We can do this only after we checked the policy.
+ // otherwise we will returns ACCESS_DENIED for all paths
+ // that are not specified by a policy, even though your token allows
+ // access to that path, and the original call had a more meaningful
+ // error. Bug 4369
+ break;
+
+ __try {
+ *key = answer.handle;
+
+ if (disposition)
+ *disposition = answer.extended[0].unsigned_int;
+
+ status = answer.nt_status;
+ } __except (EXCEPTION_EXECUTE_HANDLER) {
+ break;
+ }
+ mozilla::sandboxing::LogAllowed("NtCreateKey",
+ object_attributes->ObjectName->Buffer,
+ object_attributes->ObjectName->Length);
+ } while (false);
+
+ return status;
+}
+
+NTSTATUS WINAPI CommonNtOpenKey(NTSTATUS status,
+ PHANDLE key,
+ ACCESS_MASK desired_access,
+ POBJECT_ATTRIBUTES object_attributes) {
+ // We don't trust that the IPC can work this early.
+ if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
+ return status;
+
+ do {
+ if (!ValidParameter(key, sizeof(HANDLE), WRITE))
+ break;
+
+ void* memory = GetGlobalIPCMemory();
+ if (!memory)
+ break;
+
+ std::unique_ptr<wchar_t, NtAllocDeleter> name;
+ uint32_t attributes;
+ HANDLE root_directory;
+ NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes,
+ &root_directory);
+ if (!NT_SUCCESS(ret) || !name)
+ break;
+
+ uint32_t desired_access_uint32 = desired_access;
+ CountedParameterSet<OpenKey> params;
+ params[OpenKey::ACCESS] = ParamPickerMake(desired_access_uint32);
+
+ bool query_broker = false;
+ {
+ std::unique_ptr<wchar_t, NtAllocDeleter> full_name;
+ const wchar_t* name_ptr = name.get();
+ const wchar_t* full_name_ptr = nullptr;
+
+ if (root_directory) {
+ ret = sandbox::AllocAndGetFullPath(root_directory, name.get(),
+ &full_name);
+ if (!NT_SUCCESS(ret) || !full_name)
+ break;
+ full_name_ptr = full_name.get();
+ params[OpenKey::NAME] = ParamPickerMake(full_name_ptr);
+ } else {
+ params[OpenKey::NAME] = ParamPickerMake(name_ptr);
+ }
+
+ query_broker = QueryBroker(IpcTag::NTOPENKEY, params.GetBase());
+ }
+
+ if (!query_broker)
+ break;
+
+ SharedMemIPCClient ipc(memory);
+ CrossCallReturn answer = {0};
+ ResultCode code = CrossCall(ipc, IpcTag::NTOPENKEY, name.get(), attributes,
+ root_directory, desired_access, &answer);
+
+ if (SBOX_ALL_OK != code)
+ break;
+
+ if (!NT_SUCCESS(answer.nt_status))
+ // TODO(nsylvain): We should return answer.nt_status here instead
+ // of status. We can do this only after we checked the policy.
+ // otherwise we will returns ACCESS_DENIED for all paths
+ // that are not specified by a policy, even though your token allows
+ // access to that path, and the original call had a more meaningful
+ // error. Bug 4369
+ break;
+
+ __try {
+ *key = answer.handle;
+ status = answer.nt_status;
+ } __except (EXCEPTION_EXECUTE_HANDLER) {
+ break;
+ }
+ mozilla::sandboxing::LogAllowed("NtOpenKey[Ex]",
+ object_attributes->ObjectName->Buffer,
+ object_attributes->ObjectName->Length);
+ } while (false);
+
+ return status;
+}
+
+NTSTATUS WINAPI TargetNtOpenKey(NtOpenKeyFunction orig_OpenKey,
+ PHANDLE key,
+ ACCESS_MASK desired_access,
+ POBJECT_ATTRIBUTES object_attributes) {
+ // Check if the process can open it first.
+ NTSTATUS status = orig_OpenKey(key, desired_access, object_attributes);
+ if (NT_SUCCESS(status))
+ return status;
+
+ if (STATUS_OBJECT_NAME_NOT_FOUND != status) {
+ mozilla::sandboxing::LogBlocked("NtOpenKey",
+ object_attributes->ObjectName->Buffer,
+ object_attributes->ObjectName->Length);
+ }
+
+ return CommonNtOpenKey(status, key, desired_access, object_attributes);
+}
+
+NTSTATUS WINAPI TargetNtOpenKeyEx(NtOpenKeyExFunction orig_OpenKeyEx,
+ PHANDLE key,
+ ACCESS_MASK desired_access,
+ POBJECT_ATTRIBUTES object_attributes,
+ ULONG open_options) {
+ // Check if the process can open it first.
+ NTSTATUS status =
+ orig_OpenKeyEx(key, desired_access, object_attributes, open_options);
+
+ // We do not support open_options at this time. The 2 current known values
+ // are REG_OPTION_CREATE_LINK, to open a symbolic link, and
+ // REG_OPTION_BACKUP_RESTORE to open the key with special privileges.
+ if (NT_SUCCESS(status) || open_options != 0)
+ return status;
+
+ if (STATUS_OBJECT_NAME_NOT_FOUND != status) {
+ mozilla::sandboxing::LogBlocked("NtOpenKeyEx",
+ object_attributes->ObjectName->Buffer,
+ object_attributes->ObjectName->Length);
+ }
+
+ return CommonNtOpenKey(status, key, desired_access, object_attributes);
+}
+
+} // namespace sandbox
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